Parallel Database
Extensions
It is a software interface
layer on top of the operating system. The operating system can be MP-RAS,
Linux, or Microsoft Windows.
PDE provides Teradata Database
with the ability to:
·
Run Teradata Database in a Parallel
Environment.
·
Execute Vprocs.
·
Apply a Flexible Priority Scheduler
to Teradata Database Sessions.
·
Debug the Operating System
Kernel and Teradata Database using Resident Debugging Facilities.
Trusted Parallel
Applications (TPA)
•
The PDE provides a series of
parallel operating system services to a special class of tasks
•
On an SMP or MPP system, the
TPA is Teradata Database.
TPA services include:
•
Facilities to manage parallel
execution of the TPA on multiple nodes.
•
Dynamic distribution of
execution processes.
•
Coordination of all execution
threads, whether on the same or on different nodes.
•
Balancing of the TPA workload
within a clique.
•
Resident debugging facilities
in addition to kernel and application debuggers.
PDE and MPP
Systems
The PDE also enables an MPP
system to:
- Take advantage of hardware features such as the BYNET and shared disk arrays.
- Process user applications that were written on non-Trusted Parallel Application (non- TPA) nodes and disks.
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